Missed the head for case hardened bolts. Thought this was some completely custom made intake. The F135 two barrel intake has a unique appearance from the side.
Stock early seventies two barrel should work.
The two barrel on the F135 was never offered in the US. You will probably have better luck finding a intake manifold for the one barrel carburetor. The intake you have now might work with the smaller Holley 350. I ran both the 500 and 350 on my 68 with a F145. Used the same adapter. That was...